Question

Oblicz... Kl.VI

a)3/4+5/8

b)3 1/2+4 5/6

c)2/3+3/5

d)2/3-3/5

e)1 2/7-1/2

f)9 5/8-5 7/10

g)2 3/4-5/12

h)6 1/6-3 3/8

/ = kreska ułamkowa

Answer 1

a)3/4+5/8 = 6/8 + 5/8 = 11/8 = 1 i 3/8

b)3 1/2+4 5/6 = 3 i 3/6 + 4 i 5/6 = 7 i 8/6 = 8 i 2/6 = 8 i 1/3

c)2/3+3/5 = 10/15 + 9/15 = 19/15 = 1 i 4/15

d)2/3-3/5 = 10/15 - 9/15 = 1/15

e)1 2/7-1/2 = 1 i 4/14 - 7/14 = 18/14 - 7/14 = 11/14

f)9 5/8-5 7/10 =  9 i 25/40 - 5 i 28/40 = 8 i 65/40 - 5 i 28/40 = 3 i 37/40

g)2 3/4-5/12 = 2 i 9/12 - 5/12 = 2 i 4/12 = 2 i 1/3

h)6 1/6-3 3/8 = 6 i 4/24 - 3 i 9/24 = 5 i 28/24 - 3 i 9/24 = 2 i 19/24

Answer 2

a)3/4+5/8=24/32+20/32=44/32=11/8

b)3 1/2+4 5/6=7/2+29/6=42/12+58/12=100/12=8 1/3
c)2/3+3/5 =10/15+9/15=19/15=1 4/15

d)2/3-3/5=10/15-9/15=1/15

e)1 2/7-1/2= 9/7-1/2=18/14-7/14=11/14

f)9 5/8-5 7/10= 77/8-57/10=770/80-456/80=314/80=157/40=3 37/40

g)2 3/4-5/12= 11/4-5/12=132/48-20/48=112/48=2 1/3

h)6 1/6-3 3/8= 37/6-27/8=296/48-162/48=134/48=2 19/24